import { $string, $number } from "@kshramt/runtime-type-validator";

const usernameValidator = $string();
const ageValidator = $number();

import { $object, $array, $union, $tuple, $literal } from "@kshramt/runtime-type-validator";

const userValidator = $object({
  name: $string(),
  hobbies: $array($string()),
  metadata: $union($string(), $tuple($number(), $literal('info')))
});

import { $object, $readonly, $optional, $opaque } from "@kshramt/runtime-type-validator";

const dataValidator = $object({
  readonlyString: $readonly($string()),
  optionalNumber: $optional($number()),
  readonlyOptionalUserId: $readonly($optional($opaque("UserId", $string()))),
})

import { parse, $infer } from "@kshramt/runtime-type-validator";

{
  const data = {
    name: "John",
    hobbies: ["reading", "swimming"],
    metadata: [42, "info"],
  }
  if(userValidator(data)){ // Use the validator as a type guard.
    validated: $infer<typeof userValidator> = data;
  }
}

{
  const result = parse(userValidator, {
    name: "John",
    hobbies: ["reading", "swimming"],
    metadata: [42, "information"],  // `"infromation"` does not match `$literal("info")`.
  });

  if (!result.success) {
    console.error("Validation failed:", result.path);
  }
}